船舶の正面および側面に働く風圧力低減の試み

概要

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Much effort has been spent for the development of the hull shape or energy saving devices. These efforts have been focused on the low resistance and high propulsive performance of the ship sailing in still water. In a view of actual voyage, the ship always runs under wind and wave. The wind and wave cause the speed loss or increasing the fuel consumption. Therefore, the reduction of external forces, such as wind and wave, acting on a ship is very important for the ship's performance in actual sea. In this paper, the authors study the reduction method of wind forces acting on the accommodation and the hull of ships. Square corner cut on an accommodation structure and/or a ship hull can reduce wind forces. The effect of this method is confirmed by wind tunnel tests. The test result for its application to the accommodation structure of Bulk Carrier shows the wind resistance reduction by the ratio of about 10%. The square corner cut on the side line of upper deck of the hull structure of PCC (Pure Car Carrier) gives the reduction of side wind force and yaw moment by about 20% according to the wind tunnel test. The reduction of side wind force can also reduce the drift angle of the sailing PCC in wind, and accordingly can reduce the ship resistance and speed loss. The total reduction of horsepower for PCC in such case is estimated to be about 6%.
社団法人日本船舶海洋工学会の論文
2003-09-25